package top.yuan67.demo;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.JSONWriter;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * Redis使用FastJson序列化
 */
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {
  public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
  
  private Class<T> clazz;
  
  public FastJson2JsonRedisSerializer(Class<T> clazz) {
    super();
    this.clazz = clazz;
  }
  
  @Override
  public byte[] serialize(T t) throws SerializationException {
    if (t == null) {
      return new byte[0];
    }
    return JSON.toJSONString(t, JSONWriter.Feature.WriteClassName).getBytes(DEFAULT_CHARSET);
  }
  
  @Override
  public T deserialize(byte[] bytes) throws SerializationException {
    if (bytes == null || bytes.length <= 0) {
      return null;
    }
    String str = new String(bytes, DEFAULT_CHARSET);
    
    return JSON.parseObject(str, clazz, JSONReader.Feature.SupportAutoType);
  }
}
